US6488764B2ExpiredUtilityA1

Cement composition with polymeric latexes prepared in the presence of amps seed

93
Assignee: OMNOVA SOLUTIONS INCPriority: Jan 26, 1999Filed: Sep 11, 2001Granted: Dec 3, 2002
Est. expiryJan 26, 2019(expired)· nominal 20-yr term from priority
Inventors:Ira John Westerman
Y10S525/902Y10S526/923C08F 257/02C04B 2111/0062C09K 8/46C04B 24/2676C04B 2103/0063C04B 28/145C04B 24/2688E04C 2/043C04B 24/163C04B 2103/0062C08F 291/00
93
PatentIndex Score
81
Cited by
33
References
9
Claims

Abstract

A cement composition comprising a polymeric latex prepared by aqueous emulsion polymerization of a monomeric mixture comprising styrene and butadiene in the presence of a seed polymer prepared by aqueous emulsion polymerization of styrene and a salt of 2-acrylamido-2-methylpropanesulfonic acid.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
       1. A cement composition comprising portland cement, mineral aggregate and an additive including a latex prepared by aqueous emulsion polymerization of a monomeric mixture comprising styrene and butadiene in the presence of a seed polymer prepared by aqueous emulsion polymerization of styrene and a salt of 2-acrylamido-2-methylpropanesulfonic acid. 
     
     
       2. A cement composition comprising portland cement, mineral aggregate and an additive including a latex prepared by the process of aqueous emulsion polymerization of styrene and a salt of 2-acrylamido-2-methylpropanesulfonic acid to form a seed polymer and then sequentially adding a mixture consisting essentially of monomers comprising styrene and butadiene under emulsion polymerization conditions. 
     
     
       3. The cement composition of  claim 1  wherein the aqueous emulsion for preparing the seed polymer further comprises butadiene. 
     
     
       4. The cement composition of  claim 1  wherein the monomeric mixture further comprises a nonionic monomer. 
     
     
       5. The cement composition of  claim 4  wherein the aqueous emulsion for preparing the seed polymer further comprises butadiene. 
     
     
       6. The cement composition of  claim 1  wherein the aqueous emulsion for preparing the seed polymer further comprises (meth)acrylonitrile. 
     
     
       7. The cement composition of  claim 6  wherein the aqueous emulsion for preparing the seed polymer further comprises butadiene. 
     
     
       8. The cement composition of  claim 1  wherein the aqueous emulsion for preparing the seed polymer further comprises di(meth)acrylate with ethylene oxide spacer units. 
     
     
       9. The cement composition of  claim 8  wherein the aqueous emulsion for preparing the seed polymer further comprises butadiene.

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